Die-hammering machine.



PATENTED OCT. 24, 1905.

J. A. HORTON.

DIE HAMMERING MACHINE.

APPLICATION FILED MAYZI. 1903.

2 SHBBTS-SHBET 1.

PATENTEDOCT. 24, 1905.

J. A. HORTON. DIE HAMMERING MACHINE.

APPLICATION FILED MAY 21, 1903.

2 SHEETS-SHEET 2.

jLUenZv: W W77 llllTE S JAMES A. HORTON, OF PROVIDENCE, RHODE lSLANl), ASSIGNOR TO IRO- QUOIS MACHINE COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

DlE-HAWlWIEHlNG lVlAGl-HNE.

Specification of Letters Patent.

Patented Oct. 24, 1905.

To (all 1071,0771 it nuty concern.-

1 Be it known that I, J AMES A. HoR'roN, of Providence, in the county of Providence and State of Rhode Island, have invented certain new and useful Improvements in Die-Hammering Machines, of which the following is a specification.

This invention relates to means for hammering metallic articles, such as wire-drawing dies, to condense and compact the metal at a certain part or parts, the part compacted in a wire-drawing die being that which contains the mouth or smaller end of the wire-reducing orifice of the die.

A wire-drawing die as ordinarily made is a block of steel having a tapering orifice extending through it, the smaller end of the orifice corresponding to the gage of the wire leaving the die while being reduced by its passage through the die. The wear of the die causes a gradual enlargement of the reduced end of the orifice. To compensate for this enlargement, it is customary to hammer the die on the side containing the reduced end of the orifice, the hammering operation compacting and condensing the metal and thus reducing the size of the smaller end of the die. This hammering operation usually closes the smaller end of the die or interferes with its symmetry; but this is compensated for by reaming out the closed part of the orifice with a suitable tool.

My invention has for its object to enable the operation above described to be performed more rapidly, accurately, and to better ad vantage than heretofore; and to this end it consists in the improvements hereinafter described and claimed relating to a wire-die-h ammering machine.

Of the accompanying drawings, forming a part of this specification, Figure 1 represents a top plan view of a wire-die-hammering machine embodying my invention. Fig. 2 represents a side elevation of the same, the die being shown in section in position to be operated on by the machine. Fig. 3 represents an end elevation. Fig. 4 represents a section on line 4: 4 of Fig. 1.

The same reference characters indicate the same parts in all the figures.

In the drawings, (4 represents the bed or base portion of the machine, the same being provided with a raised anvil b to support the die 0, which is to be hammered.

(Z represents a shaft journaled in hearings on the base a, said shaft being rotated by power suitably applied-for instance, as by a belt running on a pulley (Z,affiXed to said shaft. The shaft is provided with a cam a, which imparts motion in one direction to the hammer hereinafter described, said hammer being reciprocated in a path which causes it to move toward and from the anvil b.

The hammer above mentioned is composed of a head f, preferably tapered to form a reduced striking end or peen f" and a resilient helvef'", attached at one end to the head f and at the other end to a block or rocker f", which is mounted to oscillate on centers or pivots f aflixed to cars on the supporting-frame. The block or hub-block f and the helve in the vicinity of the pivotal axis of the hammer may be termed the hub portion of the hammer.

9 represents a spring which is attached at one end to a lever 0 or other suitable support and at the other end to a lug g, afiixed to the helve f Said spring tends to pull the helve and the hammer-head downwardly.

The cam a is arranged to act on a nose or projection f on the rocker f the arrangement being such that the rotation of the cam in the direction indicated by the arrow in Fig. 2 tends to raise the helve f and the hammerhead f'. It will be seen, therefore, that when the shaft (Z is rapidly rotated the cam e and spring 9 cooperate in rapidly vibrating the helve f and reciprocating the head f toward and from the anvil Z).

[L represents a fixed fulcrum-piece supported by the frame a at a point between the oscillating block f supporting the resilient helve, and the hammer-head f. Said fulcrum-piece is arranged to arrest the downward movement of the helve with the hammer-head raised above the die 0, which rests upon the anvil, as shown in Fig. 2, so that if the helvef were rigid the hammer could not strike the die. The arrangement of the fulcrum la is such, however, that the resilience of the helve enables the hammer to reach and strike the die in consequence of the flexure of the helve after it comes in contact with the fulcrum it. The hammer is thus caused to strike a whipping blow at each downward movement of the helve, the fulcrum preventing the rebound of the hammer from causing another blow on the die, so that each downward movement of the die and prevents it from slipping about edgewise on the anvil, and is also a device for sideshifting and centering the die. In case the die is placed carelessly on the anvil, with its orifice not quite in proper position, the pin 7', engaging the inclined side of the orifice and being forced upwardly by the spring l presses on the nearest wall of the orifice and shifts the die sidewise until the orifice is exactly central over the pin. At the same time the pin permits the die to be rotated upon the anvil so as to bring different parts of its surface into the path of the hammer. The pin j is preferably yieldingly supported by means of a spring 7a, so that the pin may conform to the taper of the orifice c in the die. Said pin is somewhat eccentric to or out of alinement with the path of the hammer, so that the center of rotation of the die, which is turned or rotated by the operators hand, causes the hammer to condense and compact a circular area on the surface of the die, the diameter of said area depending upon the degree of eccentricity of the pin It will be observed that the point of the hammer-head f strikes on the side of the die-opening c away from the fulcrum of the hammerthat is, the centering-pin j is located between the striking-point of the hammer and the fulcrum l2. thereof. This arrange ment has the effect of giving the hammer a slight drawing or hooking blow toward the die-opening, which is more effective than a straight-line blow in reducing the diameter of the opening.

I prefer to provide means for varying the relative positions of the pin and the path of the hammer f, or, in other words, the eccentricity of the pin, to the end that the area which is hammered may be correspondingly varied. This result is accomplished, as herein shown, by providing the helve f with longitudinal slots f, through which pass the attaching-screws f which secure the helve to the rocker f By loosening the screws f and adjusting the helve lengthwise the distance between the path of the hammer and longitudinal center of the pin j may be inupon the upper side of the die without preventing the rotation of the die upon the pin The presser-foot is provided with an opening into which the hammer descends in striking the die. It is evident that this presser and the anvil constitute a loose holding clamp which permits the die to be rotated by the operators fingers about the pin 7' as a center. The presser m is normally elevated through a link connection m and a lever 0, pivoted at 0 to the frame, said lever being raised by a spring g and depressed by a treadle connection 7". To the other arm of the lever is attached a link 39, connected with the heel of the hammer-helve f so that when the treadle which is attached to the connection r is released by the operator the hammer f and presser m will be elevated, the spring q being of greater effect than the spring g.

The fulcrum la is preferably adjustable vertically to vary the force of the hammer-blow. This vertical adjustment may be provided for by giving the fulcrum-piece an inclined lower edge h, the same resting on the inclined bottom of a slot in a post a on the supportingframe, the inclined surfaces constituting wedging members. The attaching-screw (4 which secures the fulcrum-piece, passes through an inclined slot in? in the fulcrum-piece.

Among the advantages of my invention may be mentioned the following in addition to some already indicated.

First. The striking blow of the hammer is effected by a spring instead of wholly by the weight of the hammer, as is frequently the case. This enables the hammer to strike a quick sharp blow, lightens the parts, and enables the hammer to be put out of action at any desired instant.

Second. The hammer is rendered inoperative by means which act directly on the hammer.

Third. The parts are normally in position for insertion of the workthat is, the hammer and presser are both raised, so that the work may be positioned on the anvil without first operating or preadjusting the mechanism.

I claim 1. A die-hammering machine comprising an anvil, a hammer cooperating therewith, diecontrolling means, a presser, yielding means normally elevating said presser and mechanism connected to said presser and said hammer for simultaneously depressing said presser upon a die supported on the anvil, and bringing said hammer into operation.

2. A die-hammering machine comprising an anvil, a pivotal hammer having a head and resiliently constructed between its pivot and the head, a non-yielding abutment which rigidly arrests the hammer at a point in the resiliently-acting portion, and hammer-retracting means constructed to abruptly release the hammer.

3. A die-hammering machine comprising die-supporting means, a pivotal hammer having a resilient helve and a strikinghead thereon, an abutment arranged. to engage and arrest said helve between the pivot and head of the hammer, means for positively retracting the hammer, and means for yieldingly projecting it into cooperation with said abutment whereby a whipping blow is delivered.

4. A die-hammering machine comprising a resilient pivotal hammer, means for retracting and abruptly releasing the same, an abutment to arrest aportion of said hammer short of striking position, leaving the rest of the hammer free to complete its stroke, and relatively slidable wedge-formed surfaces for adjusting the operative position of said abutment.

5. A die-hammering machine comprising an anvil, die-centering means, a pivotal resilient hammer, and hammer-operating means, said JAMES A. HORTON.

Witnesses:

C. F. BROWN, A. D. HARRISON. 

